Gas burner and the like



Aug. 20, 1929.

M. J. ROBERTS 1,725,304

GAS BURNER AND THE LIKE Filed Jan- 6. 1928 2 Sheets-Sheet l /7 AAAAIA\\AAAAAAAAAA^A A fr0/@Via Aug. 20,- 1929. M. J. ROBERTS GAS BURNER AND THE LIKE Filed Jan- 6. 1928 2 Sheets-Sheet 2 Patented Aug. 20, 1.929.

UNITED l STATES- mman '.1. noname, or nUrrALo, maw Yoax, AssreNon 'ro noname-connor nunca conformaron, or Buruma, Naw Yonx, a conromrrou or maw You GAS BURNER AND THE LIKE.

application nea January s, 192s. serial no. 244,884.

This invention relates to heating devices, and particularly to the use of gas or, fluid fuel burners in 'heaters of the solid fuel burning type. I p

An object of this invention is to improve\ heaters operated by fluid fuels, and increase their efficiency. l

` Another object of the invention is to provide an improved fluid fuel burner for usein existing types of heaters originally designed for the use of solid fuel; with which v*such heaters may be operated with gas or .other fluid fuel in an elicient and economical manner; with which a maximum ossible heat transfer from the burning fuel).to the heating device may be obtained; which ma be applied to' heaters having fire pots of Adi ferent sizes; with which the hot gases of combustion maybe effectivel confined in I proximity to the fire pot wal s; and which will .be relativelysimple, efficient andinexpensive.

A further `obj ect of the invention is to provide an improved radiant element which may be used with heaters which have been arranged for the use of fluid or gaseous fuel.

Various other objects and advantages will be apparent from the following description of an embodiment of the invention, and thev v30 novel features will be particularly pointed out hereinafter in connection with the appended claims.

In the accompanying drawing Fig. 1 is a face elevation 'ofa radiant element constructed in 'accordance with this invention;

Fig. 2 is one side elevation of the same;

Fig. 3 is another side elevation of the same;

Fig. 4 is one end elevation of the same;

Y Fig. 5 is the opposite end elevation of the same;

Fig. 6 isa sectional elevation of the same,

Vwith the section taken approximately along the line 6-6 of Fig. 1;

i Fig. 7 is a sectional elevation of a'portion of a fire pot and burner, with one of the improved radiant elements in operative position;

Fig. 8 is a perspective illustrating the aplication of the inventionto a coal burning boiler of the .household heatingl type, which has been arranged for the use of gaseous fuel'in accordance. with this invention;

Fig. 9 is a sectional Aplanl of a portion of i the same on a larger scale, the section being taken through the fire pot just above the radiant elements; and

Fig. 10 is a perspective of one of the radiant elements.

In the illustrated embodiment of the inventlon, the invention is incorporated in a b oller 1 (Fig. 8) of the type commonly utilized for heating residences or small building. A gas burner 2 is mounted within the fire ot 3 of this boiler 1 at the bottom of the re pot, the burner being of arcuate or circular ring type which extends adjacent and albng the lateral or side wall of the lire pot. Such a burner may have o enings 4 through which the gas mlxture to be burned emerges. One chamber I2 Fig. 7) of the burner ring may be suppli A`with gas and air by suitable pipes 5, each extending out- Wardlv through the ashpit door 6 and terminating in an adjustable air and gas mixing valve 7 of suitable construction. Additional and auxiliary air m`ay be admitted to the -other chamber 2b of the burner ring through a duct 8 which is connected to the ring and opens into a chamber- 2b, the duct 8 extending through the ash pit door. The outer end of the duct 8 is controlled by a. suitable damper or door 9. The door 9 is operated by cable. 10 from a thermostaticall controlled motor or device 11, and the cab e 10 is connected to and also operates a valve 12 profio ' vided in the gas supply pipe 13 leading to the mixing devices 7 Hence, when the valve 12 is operated to cut oi the supply offuel, the door 9 will be closed to prevent the entrance of air into the fire pot.

The upper face of burner ring 2 may be*l provided with annular ribs 14 concentric with one another. A plurality of radiant 95 elements 15 in the form of plate-like strips Y are supported endwise upon the upperpface of the burner ring, inside of the row of burner openings 4, and `allowed to lean against the firepot wall. T he radiant elements will 100 thus be supported in inclined or oblique pov sitions above the burner openings 4, so as to be in the path of the flames from such openings, and the lower ends will be held against slidingby the ribs 14. The radiant elements may be made of any suitable material which is fire-resistant and capable of absorbing and radiating heat, such materials being well known lin the art. l

The radiant elements may have the form of these elements may also be provided with a plurality of. relatively small pronounced 4rojections or protuberances 17 which may e engaged directly by the ames leaving the burner openings 4, and it has been found that by the use of such projections, the radiating elements will take up by conduction a considerable quantity of heat from the ames and gases of combustion, and will radiate this absorbed heat directly towards the fire pot wall.

The tapered radiant elements are arranged side by side and progressively overlapped in a shingle-like manner. Diagonally opposite side edges of each strip are bevelled to provide contact faces 18 and 19. These beveled or oblique faces permit of various degrees of overlap of the radiant elements, and have surfaces which' are of the type geometrically known as warped surfaces. llhe warping occurs progressively from end to end of each element, and by reason of these warped surfaces which overlap one another, the elements may bet overlapped to different ex tents, or spread out to various extents in a fan-like manner, and still have a continuous contact with one'a'nother along the entire lengths of the overlapping faces. The firepots of different heating plants vary considerably in size, and hence the inclination of the'radiant elements will vary considerably when installed in different fire pots. The same size radiant elements may be used for all of the usual heaters, even when of different sizes, the warpedsurfaces 18 and 19 permitting the fan-like'spreading of the upper ends as they fit the firepots of different sizes. By having contact continuous along the v overlapped faces, the gases. of combustion from the burner ring will be moreeifectivcly conned to the chamber between the radiant elements and the lire pot and compelled to pass upwardly along the radiant elements and through the channels formed by the concave surfaces 16..

By the use of radiant elements in the manner hereinbefore described and illustrated,

, effective use is made of radiant heat which is the most effective of the three different forms of heat, to wit, conducted, convected and radiant heat. These radiant elements cause friction of the flames against the furnace walls, and by confining the flames in proxheat of the flames to the interior of the fire A pot or heating chamber, where a heat transfer to the fire pot walls is impossible or less efficient and by taking up conducted heat from the flame and radiating it as radiant heat towards the fire pot walls, a more effective heat transfer to the firepot walls is obtained. The radiant elements become very hot and superheat the gases coming from the burner, and thus insure a complete combustion of the fuel. When the burners are shut off by the thermostatically controlled motor or device 1l, the door 9 will be closed, and thusno further air can enter the duct leading. to the air chamber 2b of the burner ring or enter `the Ere pot, and thus cool the radiant elements. These radiant elements which have previously been heated to a high temperature will slowly radiate the absorbed eat to the fire pot walls and insure a continuance of heat transfer to the lire pot walls long after the burners have been shut down.

It will "be obvious that various changes in the details, which have been herein described and illustratedz in order to explain the nature of the invention, may be made by those skilled in the art within the principle and scope of the invention as' expressed in the appended claims.

I claim as my invention 1. A gas burner for use in heating devices having a fire box, comprising a burner disposed in said fire box and extending along and adjacent the wall thereof, radiant wall elements disposed obliquely across the flame' from said burner and towards said wall, for radiating towards said wall heat which it absorbs from said flame, said elementsy being progressively overlapped side by side in a shingle-like manner.

2. A gas burner for use in heating devices having a fire box, comprising a burner disposed in said fire box and extending along and adjacent the wall thereof, radiant .wall elements disposed obliquely across the flame from said burner and towards said wall, for radiating towards said wall heat which it absorbs from said flame, said elements being progressively overlapped side by side in a shingle-like manner, each element having upon the face engaged by said ame, a plurality of projections of greater altitude than base, for increasing the heat absorptionl and radiation of said elements.

3. A gas burner for use-in heating devices having a fire box, comprising a burner dis- -posed in said re box and extending along and adjacent the wall thereof, radiant wall elements disposed obliquely across ythe flame from said burner and towards said wall, for radiating towards said wall heat which it absorbs from said flame, said elements being progressively overlapped, the overlapping surfaces being Warped surfaces insuring a continuous line of contact between adjacent elements independently of the degree of overla and of variations in spread at the top W en used With fire pots of different diameter.

4. A gas burner for use in heating devices having a fire box, comprising a burner disposed in said fire box and extending along and adjacent the lateral wall thereof, and a plurality of radiant elements disposed in an inclined position across the plane of said burner and at their upper ends resting against said wall, said elements overlapping progressively side by side in a shingle-like manner along said Wall, each element having oblique faces along opposite side edges for contacting with and overlapping vthe next adjacent element.

5. A gas burner for use in heating devices having a 'nre box, comprising a burner disposed in said fire box and extending along and adjacent the lateral wall thereof, andA a plurality ofrradiant elements disposed in an inclined position across the plane of said burner and at their upperv ends resting against said Wall, said elements overlapping progressively side by side in a shingle-like manner alonor said Wall, each element having oblique fzaces along opposite side-edges yfor contacting with and overlapping the next adjacent element, said oblique faces being Warped surfaces permitting contact of overlapping faces along approximately their entire lengths for1 considerable variations in the spread ofthe upper ends of said element,

and also permit variations in the degree of overlap of said elements. Y

6. A gas burner for use in heating devices having afre box, comprising a burner disposed in said fire box andy extending along,

and adjacent the lateral wall thereof, al plu-.

rality of radiant elements in the form of tapered plates wider at one end than thev ot er, arranged side by side, and progressively overlapping in a shingle-like manner,

said elements extending obliquely across the flame from said burner, and at their upper ends resting a ainst said wall, the under faces of said eements at their upper ends being concave to provide spaces between the I devices having a fire pot, comprising a platelike strip of lire resisting, radiant material tapered in Width from end to end and having warped beveled surfaces along opposite side edges. j

8. A radiant element for use in heating devices having a fire pot, comprising a. platelike strip of lire resisting, radiant material tapered in width from end to end and having Warped beveled surfaces along opposite side edges, said warped surfaces being provided upon opposite faces of said strip adjacent -the side edges, said Warped surfaces being provided upon opposite-'faces of said strip adjacent the side edges. f

9. A radiant element for use in heating devices having a fire pot, comprising a platelike strip of lire resisting, radiant material tapered in width from end to end and having warped beveled surfaces along opposite side ed es, one of said 'faces adjacent the vider end being concave for some distance from that end.

10. A radiant element for use in heating devices having a fire pot, comprising a platelike strip of fire resisting, radiant material tapered in Width from end to end and having Warped beveled surfaces along opposite side edges, one of the faces of said strip having a plurality of pronounced projectionsl radiant elements with their-lower ends resting on a. part ofthe burner, said radiant' elements arranged in progressively overlappin manner, eachvsuch element resting near t e top w1th a portion adjacent one edge pressing against the fire box, and a portion adjacent the other edge pressing againstthe next adjoining element.

. MLILARD J. ROBERTS.

#fiese-.Lama Y 1,725,3o4.-Mazard.1. Roberts, Buffalo, N. Y. GAB Bumm is 'um Patent' dated Au ust 20, 1929. Disclaimer le'd October 15, 1930, by the assignee, Roberts-Go n Appliance Corporation.

lows

Hereby enters the following disclaimer in relation to certain of said claims as fol-i@ Your petitioner disclaims from the sco f Y i il I c Y. A n peo clalms16,and11an ov l adjacent elements, 1n which an `element adjacent its upperend contadts proximately 1n contact with thef fire box at or adjacent to both side edges of said element, as shown in the patent to Ebinr No. 753,250, of March 1, 1904.

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